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On CAPS, 14% of the 2,650 members who have rated Chipotle believe the stock will underperform the S&P 500 going forward. These bears include mcw841 and All-Star TMFPlatoish, who is ranked in the top 1% of our community.

Earlier this month, mcw841 listed several of the stock's negatives: "Overvalued. Margins will be squeezed by soft commodity prices. Competition is also increasing."

CAPS All-Star TMFPlatoish also thinks the Chipotle bear case all boils down to price:

Well conceived and managed company with blue blood fast food ancestry. It looks over-valued from a fundamentals perspective by quite a lot unless you believe it can replicate McDonald's buildout pattern. I consider that unlikely and would give it an additional discount for the potential for it to be something of a fad with limited endurance. It's a decent place to eat but nothing I'd travel far for. ... It does deserve something of a premium to its peer group, but I believe it got ahead of itself.

What do you think about Chipotle, or any other stock for that matter? If you want to retire rich, you need to protect your portfolio from any undue risk. Staying away from dangerous stocks is crucial to securing your financial future, and on Motley Fool CAPS, thousands of investors are working every day to flag them. CAPS is 100% free, so get started!